Class PDFunctionType2
- java.lang.Object
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- org.apache.pdfbox.pdmodel.common.function.PDFunction
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- org.apache.pdfbox.pdmodel.common.function.PDFunctionType2
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- All Implemented Interfaces:
COSObjectable
public class PDFunctionType2 extends PDFunction
This class represents a Type 2 (exponential interpolation) function in a PDF document.
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Constructor Summary
Constructors Constructor Description PDFunctionType2(COSBase function)
Constructor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description float[]
eval(float[] input)
Performs exponential interpolation Evaluates the function at the given input.COSArray
getC0()
Returns the C0 values of the function, 0 if empty.COSArray
getC1()
Returns the C1 values of the function, 1 if empty.int
getFunctionType()
Returns the function type.float
getN()
Returns the exponent of the function.java.lang.String
toString()
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Methods inherited from class org.apache.pdfbox.pdmodel.common.function.PDFunction
clipToRange, clipToRange, create, eval, getCOSObject, getDomainForInput, getNumberOfInputParameters, getNumberOfOutputParameters, getPDStream, getRangeForOutput, getRangeValues, interpolate, setDomainValues, setRangeValues
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Constructor Detail
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PDFunctionType2
public PDFunctionType2(COSBase function)
Constructor.- Parameters:
function
- The function.
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Method Detail
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getFunctionType
public int getFunctionType()
Returns the function type. Possible values are: 0 - Sampled function 2 - Exponential interpolation function 3 - Stitching function 4 - PostScript calculator function- Specified by:
getFunctionType
in classPDFunction
- Returns:
- the function type.
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eval
public float[] eval(float[] input) throws java.io.IOException
Performs exponential interpolation Evaluates the function at the given input. ReturnValue = f(input)- Specified by:
eval
in classPDFunction
- Parameters:
input
- The array of input values for the function. In many cases will be an array of a single value, but not always.- Returns:
- The of outputs the function returns based on those inputs. In many cases will be an array of a single value, but not always.
- Throws:
java.io.IOException
- if something went wrong processing the function.
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getC0
public COSArray getC0()
Returns the C0 values of the function, 0 if empty.- Returns:
- a COSArray with the C0 values
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getC1
public COSArray getC1()
Returns the C1 values of the function, 1 if empty.- Returns:
- a COSArray with the C1 values
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getN
public float getN()
Returns the exponent of the function.- Returns:
- the float value of the exponent
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toString
public java.lang.String toString()
- Overrides:
toString
in classPDFunction
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